ROQ to M4B
Convert ROQ to M4B Audiobook, ROQ to M4B Converter
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ROQ to M4B Software converts ROQ files to M4B audiobook. The software is an ALL-IN-ONE audio converter that supports more than 110 audio and video files.
ROQ to M4B Software supports batch conversion and is full compatible with Windows 10/8/7/Vista/XP/2000.
Right-click converted item and choose "Play Destination" to play the destination file, choose "Browse Destination Folder" to open Windows Explorer to browse the destination file.
What is ROQ?
The format runs at a fixed 30 frames per second with an optional 22050 Hz mono or stereo sound track. Videos may technically be up to 65520 x 65520 pixels with both dimensions divisible by 16 and produce a valid RoQ file, but none of id Software's games will play back a video with dimensions that aren't a power of two, most likely because of OpenGL's texture sizing restrictions.
NOTE: It's been reported that movies with dimensions greater than 512 x 512 cause issues in various id Software games. Until this can be positively confirmed or denied it's best to avoid higher resolutions.
RoQ is a motion compensating vector quanitizer format, similar to Cinepak, but higher quality due to the use of the ITU-R BT.601 colorspace (the same one used in component video, PAL televisions, JPEG and MPEG), whereas Cinepak uses a low-quality YUV-like colorspace designed for faster decoding that often results in gamut degradation before compression even begins.
Because it's a vector quantizer, RoQ files are very fast to decode and very slow to encode. Decoding involves nothing more than converting the colorspace of the codebooks and then copying data, whereas encoding involves using several complicated schemes to produce a "palette" of image fragments that will result in the least degradation.
RoQ uses two codebooks per frame, with the second being constructed from pieces of the first, with up to 256 entries each. Due to this, only 1024 new colors can be introduced each frame, severely limiting the color gamut. This could arguably be improved by better predicting which sections will be motion compensated, but doing so is difficult, since codebook entries are generated from non-motion-compensated image sections, but whether or not they'll be used depends on the quality of them compared to motion compensated sections, resulting in a chicken-and-egg problem. This is made worse by the fact that all three major RoQ codecs are single-pass.
While the format is limited and much lower quality than MPEG and Indeo Video, it was presumedly preferred by id Software because of the lack of royalties, the lack of patent liability that presents a serious problem with most video formats, and the absence of complex platform-specific APIs.
What is M4B?
The M4B extension is used by audiobooks downloaded from the Apple iTunes store; these audiobooks may be copy-protected using Apple's FairPlay DRM, which means they can only be played on authorized computers or iPods.
Convert ROQ to M4B Related Topics: DAT to M4B, DIVX to M4B, DV to M4B, DVR-MS to M4B, H263 to M4B, H264 to M4B, HDTV to M4B, IT to M4B, KAR to M4B, MKA to M4B, MLP to M4B, MP1 to M4B, MPE to M4B, NUV to M4B, OGA to M4B, OGM to M4B, ROQ to M4B, RPL to M4B, S3M to M4B, SDP to M4B, SHN to M4B, VFW to M4B, VID to M4B, VMD to M4B, VQF to M4B, AAC to M4B, AIFF to M4B, M4B to MP3, M4B to MP4, M4B to WAV, MO3 to M4B, MOD to M4B, TTA to M4B, UMX to M4B, WAV to M4B, WMA to M4B, FLV to M4B, M4A to M4B, MKV to M4B, MOV to M4B
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